--- a/doc/Makefile
+++ b/doc/Makefile
@@ -1,6 +1,9 @@
 SOURCES=$(wildcard *.[0-9].txt)
 MAN=$(SOURCES:%.txt=%)
 HTML=$(SOURCES:%.txt=%.html)
+PREFIX=/usr/local
+MANDIR=$(PREFIX)/man
+INSTALL=install -c
 
 all: man html
 
@@ -23,5 +26,12 @@ hg.1.gendoc.txt: ../mercurial/commands.p
 %.html: %.txt
 	asciidoc -b html4 $*.txt || asciidoc -b html $*.txt
 
+install: man
+	for i in $(MAN) ; do \
+	  subdir=`echo $$i | sed -n 's/.\+\(\.[0-9]\)$$/man\1/p'` ; \
+	  mkdir -p $(MANDIR)/$$subdir ; \
+	  $(INSTALL) $$i $(MANDIR)/$$subdir ; \
+	done
+
 clean:
 	$(RM) $(MAN) $(MAN:%=%.xml) $(MAN:%=%.html) *.[0-9].gendoc.txt